Helllo - I have a 2004 Hyundai Sonata. It's been running fine until a month or two ago, when it started having some issues. I would drive down a hill each day in the morning, applying the break while letting off the gas. When I am at the bottom of the hill and start applying the gas, nothing would happen. The car pauses and then literally kicks into gear. I noticed this problem mainly seemed to happen when it was cold outside. But now it's happened other times - it happened this morning, and then the engine malfunction light came on. I'm sure what the problem is.